import { getFileType } from './helper';

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string}
 */
export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null;
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}';
  let date;
  if (typeof time === 'object') {
    date = time;
  } else {
    if (typeof time === 'string' && /^[0-9]+$/.test(time)) {
      time = parseInt(time);
    }
    if (typeof time === 'number' && time.toString().length === 10) {
      time = time * 1000;
    }
    date = new Date(time);
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay(),
  };
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key];
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') {
      return ['日', '一', '二', '三', '四', '五', '六'][value];
    }
    if (result.length > 0 && value < 10) {
      value = '0' + value;
    }
    return value || 0;
  });
  return time_str;
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000;
  } else {
    time = +time;
  }
  const d = new Date(time);
  const now = Date.now();

  const diff = (now - d) / 1000;

  if (diff < 30) {
    return '刚刚';
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前';
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前';
  } else if (diff < 3600 * 24 * 2) {
    return '1天前';
  }
  if (option) {
    return parseTime(time, option);
  } else {
    return (
      d.getMonth() + 1 + '月' + d.getDate() + '日' + d.getHours() + '时' + d.getMinutes() + '分'
    );
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function getQueryObject(url) {
  url = url == null ? window.location.href : url;
  const search = url.substring(url.lastIndexOf('?') + 1);
  const obj = {};
  const reg = /([^?&=]+)=([^?&=]*)/g;
  search.replace(reg, (rs, $1, $2) => {
    const name = decodeURIComponent($1);
    let val = decodeURIComponent($2);
    val = String(val);
    obj[name] = val;
    return rs;
  });
  return obj;
}

/**
 * @param {string} input value
 * @returns {number} output value
 */
export function byteLength(str) {
  // returns the byte length of an utf8 string
  let s = str.length;
  for (var i = str.length - 1; i >= 0; i--) {
    const code = str.charCodeAt(i);
    if (code > 0x7f && code <= 0x7ff) s++;
    else if (code > 0x7ff && code <= 0xffff) s += 2;
    if (code >= 0xdc00 && code <= 0xdfff) i--;
  }
  return s;
}

/**
 * @param {Array} actual
 * @returns {Array}
 */
export function cleanArray(actual) {
  const newArray = [];
  for (let i = 0; i < actual.length; i++) {
    if (actual[i]) {
      newArray.push(actual[i]);
    }
  }
  return newArray;
}

/**
 * @param {Object} json
 * @returns {Array}
 */
export function param(json) {
  if (!json) return '';
  return cleanArray(
    Object.keys(json).map(key => {
      if (json[key] === undefined) return '';
      return encodeURIComponent(key) + '=' + encodeURIComponent(json[key]);
    }),
  ).join('&');
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = url.split('?')[1];
  if (!search) {
    return {};
  }
  return JSON.parse(
    '{"' +
      decodeURIComponent(search)
        .replace(/"/g, '\\"')
        .replace(/&/g, '","')
        .replace(/=/g, '":"')
        .replace(/\+/g, ' ') +
      '"}',
  );
}

/**
 * @param {string} val
 * @returns {string}
 */
export function html2Text(val) {
  const div = document.createElement('div');
  div.innerHTML = val;
  return div.textContent || div.innerText;
}

/**
 * Merges two objects, giving the last one precedence
 * @param {Object} target
 * @param {(Object|Array)} source
 * @returns {Object}
 */
export function objectMerge(target, source) {
  if (typeof target !== 'object') {
    target = {};
  }
  if (Array.isArray(source)) {
    return source.slice();
  }
  Object.keys(source).forEach(property => {
    const sourceProperty = source[property];
    if (typeof sourceProperty === 'object') {
      target[property] = objectMerge(target[property], sourceProperty);
    } else {
      target[property] = sourceProperty;
    }
  });
  return target;
}

/**
 * @param {HTMLElement} element
 * @param {string} className
 */
export function toggleClass(element, className) {
  if (!element || !className) {
    return;
  }
  let classString = element.className;
  const nameIndex = classString.indexOf(className);
  if (nameIndex === -1) {
    classString += '' + className;
  } else {
    classString =
      classString.substr(0, nameIndex) + classString.substr(nameIndex + className.length);
  }
  element.className = classString;
}

/**
 * @param {string} type
 * @returns {Date}
 */
export function getTime(type) {
  if (type === 'start') {
    return new Date().getTime() - 3600 * 1000 * 24 * 90;
  } else {
    return new Date(new Date().toDateString());
  }
}

/**
 * 防抖函数
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce(func, wait, immediate) {
  let timeout, args, context, timestamp, result;

  const later = function () {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp;

    // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last);
    } else {
      timeout = null;
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args);
        if (!timeout) context = args = null;
      }
    }
  };

  return function (...args) {
    context = this;
    timestamp = +new Date();
    const callNow = immediate && !timeout;
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait);
    if (callNow) {
      result = func.apply(context, args);
      context = args = null;
    }

    return result;
  };
}

/**
 * This is just a simple version of deep copy
 * Has a lot of edge cases bug
 * If you want to use a perfect deep copy, use lodash's _.cloneDeep
 * @param {Object} source
 * @returns {Object}
 */
export function deepClone(source) {
  if (!source && typeof source !== 'object') {
    throw new Error('error arguments', 'deepClone');
  }
  const targetObj = source.constructor === Array ? [] : {};
  Object.keys(source).forEach(keys => {
    if (source[keys] && typeof source[keys] === 'object') {
      targetObj[keys] = deepClone(source[keys]);
    } else {
      targetObj[keys] = source[keys];
    }
  });
  return targetObj;
}

/**
 * @param {Array} arr
 * @returns {Array}
 */
export function uniqueArr(arr) {
  return Array.from(new Set(arr));
}

/**
 * @returns {string}
 */
export function createUniqueString() {
  const timestamp = +new Date() + '';
  const randomNum = parseInt((1 + Math.random()) * 65536) + '';
  return (+(randomNum + timestamp)).toString(32);
}

/**
 * Check if an element has a class
 * @param {HTMLElement} elm
 * @param {string} cls
 * @returns {boolean}
 */
export function hasClass(ele, cls) {
  return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));
}

/**
 * Add class to element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function addClass(ele, cls) {
  if (!hasClass(ele, cls)) ele.className += ' ' + cls;
}

/**
 * Remove class from element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function removeClass(ele, cls) {
  if (hasClass(ele, cls)) {
    const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');
    ele.className = ele.className.replace(reg, ' ');
  }
}

const toString = Object.prototype.toString;

/**
 * 判断传入的值是否为Number
 * @param {any} value 需要判断的值
 * @returm Boolean
 */
export const isNumber = value => toString.call(value) === '[object Number]';

/**
 * 判断传入的值是否为String
 * @param {any} value 需要判断的值
 * @returm Boolean
 */
export const isString = value => toString.call(value) === '[object String]';

/**
 * 判断传入的值是否为普通Object
 * @param {any} value 需要判断的值
 * @returm Boolean
 */
export const isPlainObject = value => toString.call(value) === '[object Object]';

/**
 * 判断传入的值是否为数组
 * @param {any} value 需要判断的值
 * @returm Boolean
 */
export const isArray = value => toString.call(value) === '[object Array]';

/**
 * 计算字符串的字节长度，中文字符是两个字节，其他字符是一个字节
 * @param {string} val 需要计算子节长度的字符串
 */
export const getStringLength = val => {
  const str = val.toString();
  let bytesCount = 0;
  for (let i = 0, n = str.length; i < n; i++) {
    const c = str.charCodeAt(i);
    if ((c >= 0x0001 && c <= 0x007e) || (c >= 0xff60 && c <= 0xff9f)) {
      bytesCount += 1;
    } else {
      bytesCount += 2;
    }
  }
  return bytesCount;
};

/**
 * 将类数组转为真数组
 * @param {Object} arrayLike 类数组
 */
export function arrayLikeToArray(arrayLike) {
  return [].slice.call(arrayLike);
}

/**
 * 判断对象是否为空对象
 * @param {Object} obj 判断一个普通对象是否为空对象
 * @return {Boolean} 是否为空对象
 */
export const isEmptyObject = obj => Object.keys(obj).length === 0;

/**
 * 获取视频文件信息
 * @param {Object} videoFile 视频文件
 */
export const getVideoFileInfo = videoFile => {
  return new Promise(resolve => {
    const video = document.createElement('video'); // 生成video节点
    const _URL = window.URL || window.webkitURL;
    video.src = _URL.createObjectURL(videoFile);
    video.addEventListener('loadedmetadata', function () {
      const { videoWidth, videoHeight } = video;
      // 视频宽高1px容错
      const isholdWidthError =
        videoWidth === 721 || videoWidth === 1281 || videoWidth === 1441 || videoWidth === 2561;
      const isholdHeightError =
        videoHeight === 721 || videoHeight === 1281 || videoHeight === 1441 || videoHeight === 2561;

      // video宽高值和大小
      const videoFileInfo = {
        width: isholdWidthError ? videoWidth - 1 : videoWidth,
        height: isholdHeightError ? videoHeight - 1 : videoHeight,
        duration: video.duration,
        size: videoFile.size / 1024, // 将文件大小转为kb单位
      };

      _URL.revokeObjectURL(videoFile);
      resolve(videoFileInfo);
    });
  });
};

/**
 * 获取图片文件信息
 * @param {Object} imageFile 图片文件
 */
export const getImageFileInfo = imageFile => {
  return new Promise(resolve => {
    const type = getFileType(imageFile.name);
    const image = document.createElement('img'); // 生成img节点
    const _URL = window.URL || window.webkitURL;
    image.src = _URL.createObjectURL(imageFile);
    image.onload = function () {
      // image宽高值和大小
      const imageFileInfo = {
        type,
        width: image.width,
        height: image.height,
        size: imageFile.size / 1024, // 将文件大小转为kb单位
      };

      _URL.revokeObjectURL(imageFile);
      resolve(imageFileInfo);
    };
  });
};

/**
 * 过滤query参数中的空字段
 * @param {Object} obj query参数对象
 */
export const filterEmptyQuery = obj => {
  const query = {};
  Object.keys(obj).forEach(key => {
    if (obj[key] !== '') {
      query[key] = obj[key];
    }
  });
  return query;
};

/**
 * 根据参数拼接url
 **/
export const getQueryToUrl = (url, query) => {
  let path = url;
  if (isEmptyObject(query)) {
    return path;
  } else {
    path += '?';
    path += Object.keys(query)
      .map(item => `${item}=${query[item] || ''}`)
      .join('&');
    return path;
  }
};

/**
 * 兼容火狐等浏览器
 * @param {File} object 用于创建 URL 的 File 对象、Blob 对象或者 MediaSource 对象
 * @return 指定源 object的内容的URL
 **/
function createObjectURL(object) {
  return window.URL ? window.URL.createObjectURL(object) : window.webkitURL.createObjectURL(object);
}

/**
 * 文件下载
 * @param {Blob} file 文件
 * @param {Object} fileName 文件名
 * @param {Object} fileType 文件格式
 **/
export const downloadFile = (file, { fileName = parseTime(new Date()), fileType = 'xls' }) => {
  if (window.navigator.msSaveOrOpenBlob) {
    navigator.msSaveBlob(file, `${fileName}.${fileType}`);
  } else {
    var a = document.createElement('a');
    var url = createObjectURL(file);
    a.href = url;
    a.download = `${fileName}.${fileType}`;
    document.body.appendChild(a);
    a.click();
    window.URL.revokeObjectURL(url);
  }
};

/**
 * @description 将数组中的数组元素归类到相关元素的children下
 * @param {Array} list 需要递归的数组
 * @param {any} parentId 根目录唯一标识
 * @param {any} key 存放上级目录的唯一标识
 **/
export const findChildrenList = (list, parentId, key = 'parentId') => {
  let children = [];
  list.forEach(item => {
    if (item[key] === parentId) {
      children.push(item);
      const childs = findChildrenList(list, item.id);
      childs.length && (item.children = childs);
    }
  });
  return children;
};
